Grab your sneakers and get ready for a city-wide game of tag. The San Francisco game is an organized event called Journey to the End of The Night. It started in 2006 and has taken place in different cities for five years.

The game requires you to run through a series of city-wide checkpoints while avoiding being caught by chasers. If you are tagged, you join the group of chasers and begin to hunt down the runners. Sounds like fun.

The winner is the first player to reach the endpoint without being tagged by a chaser. It's a foot race only, you are not allowed to use a car, bike or skateboard. To make the race a bit more edgy, it is held at night. [ Journey to the End of The Night via Laughing Squid]